A4 REVUE BRYOLOGIQUE 
Tr. mutabile var. lillorale (Mitt). Dixon. By stream, Caldas, 
cfr. Coimbra ; st. | 
Timmiella Barbula (Schwaeg.) Limpr. Wall of bridge, Mon- 
chique; cfr. Walls and banks, Silves; cfr. Between stones of 
wall, Coimbra; cfr. : 
T. flexisela Bruch. Beneath shrubs and under boulders, on 
earth, Caldas; Picota; Foya; cfr., sparingly. To study this plant 
and ascertain its relationship with the other species of the genus 
(T..anomala and T. Barbula) was a particular object of our visit; 
but I fear we cannot feel that we have been able to settle the 
true status of the plant with any great satisfaction. Limpricht 
sums up the distinctive characters of the three species in his key 
as follows. — 
Inflorescence monoicous. 
Autoicous. Ring revolute T. anomala. 
Paroïicous. Ring wanting . T. Barbula 
Inflorescence dioicous. Ring revolute. T. flexisela. 
The absence of an annulus in T. Barbula, its paroicous inflores- 
cence, usually abundant fruit, and preference for rocks and walls, 
would seem to separate it markedly from T. flexisela, in which 
the annulus is broad, the inflorescence dioicous, and which is 
apparently always found on the bare earth. On the other hand the 
distinction between T. anomala and T. fleæisela is not so obvious 
nor s0 well defined. The inflorescence might seem to mark a clear 
difference, but it admittedly varies in T. anomala, the & flowers | 
being found principally on separate branches, occasionally 
below the fertile flower, and according to Husnot it is sometimes 
synoicous. Ï have on the other hand examined a number of spe- 
cimens of the fruiting plant gathered at Meran in 1904, without 
being able to find any © flowers, but this may probably have been 
due to the advanced condition of the specimens. 
The peristome characters also seem of some weight, the teeth 
being spirally twisted in both T. anomala and T. Barbula, erect 
and straight in T. flexisela. The capsule is narrowly cylindrical 
and frequently slightly curved in anomala, in flexisela it is rather 
short and nearly always symmetrical, but in one specimen from 
Caldas fruiting more freely than most flexisela, and with the seta 
very little flexuose, the capsules are longer and slightly curved; 
but the peristome quite straight and erect. 
The flexuose seta is one of the peculiar characters of the moss, 
and obviously the most striking one. For the most part it is slen- 
der and moderately and irregularly flexuose, but at times it is 
very strikingly curled, many of the setæ in a tuft forming a 
